# Struct proc_macro::Span [−] [src]

    pub struct Span(_);

🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

A region of source code, along with macro expansion information.

## Methods

### `impl Span`
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#### `pub fn call_site() -> Span`
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🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

The span of the invocation of the current procedural macro.

#### `pub fn source_file(&self) -> SourceFile`
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🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

The original source file into which this span points.

#### `pub fn start(&self) -> LineColumn`
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🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

Get the starting line/column in the source file for this span.

#### `pub fn end(&self) -> LineColumn`
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🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

Get the ending line/column in the source file for this span.

#### `pub fn join(&self, other: Span) -> Option<Span>`
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🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

Create a new span encompassing `self` and `other`.

Returns `None` if `self` and `other` are from different files.

#### `pub fn error<T: Into<String>>(self, message: T) -> Diagnostic`
[src]

🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

Create a new `Diagnostic` with the given `message` at the span `self`.

#### `pub fn warning<T: Into<String>>(self, message: T) -> Diagnostic`
[src]

🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

Create a new `Diagnostic` with the given `message` at the span `self`.

#### `pub fn note<T: Into<String>>(self, message: T) -> Diagnostic`
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🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

Create a new `Diagnostic` with the given `message` at the span `self`.

#### `pub fn help<T: Into<String>>(self, message: T) -> Diagnostic`
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🔬 This is a nightly-only experimental API. (`proc_macro` #38356)

Create a new `Diagnostic` with the given `message` at the span `self`.

## Trait Implementations

### `impl Copy for Span`
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### `impl Clone for Span`
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#### `fn clone(&self) -> Span`
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Returns a copy of the value. Read more

#### `fn clone_from(&mut self, source: &Self)`
1.0.0
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Performs copy-assignment from `source`. Read more

### `impl Debug for Span`
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#### `fn fmt(&self, __arg_0: &mut Formatter) -> Result`
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Formats the value using the given formatter.

### `impl PartialEq for Span`
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#### `fn eq(&self, __arg_0: &Span) -> bool`
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This method tests for `self` and `other` values to be equal, and is used by `==`. Read more

#### `fn ne(&self, __arg_0: &Span) -> bool`
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This method tests for `!=`.

### `impl Eq for Span`
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### `impl Default for Span`
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#### `fn default() -> Span`
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Returns the "default value" for a type. Read more

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